3D printing head and 3D printer

• Main Authors: LU ZHENBAO, XIN PENGHAO, LI YONGXIN, ZHANG SHOUQI, ANG YUAN, JIAO MINGMING
• Format: Patent
• Language: Chinese; English
• Published: 10.07.2020
• Subjects: ADDITIVE MANUFACTURING TECHNOLOGY; ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING; PERFORMING OPERATIONS; SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER; TRANSPORTING; WORKING CEMENT, CLAY, OR STONE

The invention discloses a 3D printing head and a 3D printer. The 3D printing head comprises a shell, a mixing unit and a nozzle; the shell includes a feed inlet and a discharge outlet, and the inner cavity wall of the shell protrudes outward to form a plurality of protrusions; the mixing unit is arranged inside the shell, wherein the mixing unit comprises a central axis and a plurality of blades arranged along the central axis at intervals; the blades and the protrusions are arranged in a staggering mode, and the distance e between the blades and the protrusions meets the formula that e is greater than or equal to 3d, wherein d is the maximum particle size of particulate matters to be mixed; and the nozzle is arranged at the discharge port of the shell. According to the 3D printing head provided by the invention, through the cooperation of the mixing unit and the protrusions of the inner wall of the shell, the particulate matters to be mixed form a laminar flow and a turbulent flow during the advancing proces